Home / 20,970.16-28,938.52-11,409.92

Finding the Fourth Proportional to 20,970.16, 28,938.52 and 11,409.92

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Solution

The fourth proportional to 20,970.16, 28,938.52 and 11,409.92 is: 15,745.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.16 : 28,938.52 = 11,409.92 : x
  2. Step 2: Convert to fraction form
    20,970.16/28,938.52 = 11,409.92/x
  3. Step 3: Cross multiply
    20,970.16x = 28,938.52 × 11,409.92
  4. Step 4: Simplify right side
    20,970.16x = 330,186,198.12
  5. Step 5: Solve for x
    x = 330,186,198.12/20,970.16
  6. Step 6: Final answer
    x = 15,745.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.